From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter regarding two types of Tungsten Composition Contacts fitted to Contact Breakers sent for testing and feedback on their performance.
| Identifier | ExFiles\Box 35\5\ scan 040 | |
| Date | 9th July 1918 | |
| X.2894. Telephone: VICTORIA 7346. Telegrams: 'ENGINEYOR, SOWEST, LONDON.' Codes: A.B.C. 5TH EDITION. THE L.P.S. ELECTRICAL Cº (J.{Mr Johnson W.M.} LERMAN, BRITISH OF RUSSIAN ORIGIN) L.P.S. Insulating Sleeving FOR CONVENIENT AND EFFICIENT INSULATION FOR ALL INTERNAL CONNECTIONS IN ELECTRICAL APPARATUS. IS. YOUR REFERENCE EFC6/T10618 OUR REFERENCE L.516. TUNGSTEN CONTACTS, INSULATING MATERIALS, TEST CLIPS. 14 Howick Place, Westminster, London S.W.1. 9th July, 1918. Messrs. Rolls-Royce, Ltd., Nightingale Road, Derby. Dear sirs, Further to your letter of the 10th June and our reply of the 14th ultimo, we now have pleasure in returning two Contact Breakers to which we have fitted Tungsten Composition Contacts of two distinct types. We have marked one "L" which please refer to in future as No. 454, and the reference number of the one which is not marked is 425. We would be glad if you would kindly watch behaviour of the two separate types and advise us of results. EL Yours faithfully, FOR THE L.P.S. ELECTRICAL CO. [Signature] Sg{Arthur F. Sidgreaves - MD} 1132/3 | ||